<?php

#[('__isset', '查看类中无权查看的成员')]
class User
{
    private $name = 'hflxhn';
    public function start()
    {
        echo "my name is hflxhn <br>";
    }

    public function __isset($a)
    {
        echo "您无权查看{$a}是否存在";
    }
}

$obj = new User();
isset($obj->name);
